John Keay (born 1941) is an English journalist and author specialising in writing popular histories about India and the Far East, often with a particular focus on their colonisation and exploration by Europeans.

John Keay is the author of about 20 books, all factual, mostly historical, and largely to do with Asia, exploration or Scotland. His first book stayed in print for thirty years; many others have become classics. His combination of meticulous research, irreverent wit, powerful narrative and lively prose have invariably been complimented by both reviewers and readers.

UK-based and a full-time author since 1973, he also wrote and presented over 100 documentaries for BBC Radios 3 and 4 from 1975-95 and guest-lectured tour groups 1990-2000. He reviews on related subjects, occasionally speaks on them, and travels extensively.